arbitrage wrote:
Jemini wrote
Thank you for confirming it.
Do you think 600/4 gives more keepers than 200-600? 'Old' (couple years ago) Nikon days the prime lenses always had much better AF compared to zoom. But 200-600's Direct Drive motor seems is way faster than Nikon's SWM in zoom lenses. One bad thing about this is that the lack of full time manual override.
arbitrage wrote
Jemini wrote
Stupid question. What's RTT?
Also how good is BEAF during action (flight) on R5? Does it really give more keepers than your A9II? I cancelled my A1 order and will buy one of these (or the mythical Nikon Z8). My primary concern is to have higher keeper rate of birds in action.
Can live without a bird sitting on a stick 😅
Thanks you
arbitrage wrote
I think the BEAF is going to be very situation dependent. I don't think it will be useful in as many situations as the R5/R6. I think having a custom key programmed to toggle it on/off will be important.
But it does sound like RTT is amazingly sticky now and that may mean that BEAF is not needed as much as we would think. I usually don't use RTT on A9II and instead prefer just Zone AF. I'm thinking I'm going to be using RTT a lot more on the A1 but maybe rely on BEAF as much as I do with my R5.
We've seen some videos like the Bee-eater where the A1's BEAF system is ridiculously good and instantaneous as the bird lands. That will be quicker to have AF than targeting that bird with a RTT point or even Zone AF to some degree. But that is a very clean perch, bird and clean, grossly OOF background. Some might argue a situation where no one needs BEAF anyways. It depends...if that bird lands, looks once towards you and then flies again within a split-second the BEAF might make the difference over aiming with a different AF mode.
I'm sure after a weekend with this camera I'll have a pretty good idea where BEAF stands against the R5 and if BEAF is going to be of much use. Thankfully BEAF is not one of my main driving features to buy this camera. I do hope that FW will improve it but I would not make a purchase based on such hopes of BEAF is a big selling feature to you. No the BEAF on R5 for BIF doesn't give more keepers for any type of fast bird. It has helped keep AF off of near wings on larger herons, eagles etc. I find my A9II gives higher keeper rate just using plain old Zone or Wide on smaller, fast, erratic BIF than the R5 does in any mode. The R5 does light up the Eye-AF square a fair amount even on faster/smaller BIF (at least duck sized). But yeah, if it doesn't give any better results than who cares. On the A7RIV it does but on the A9/A9II I really don't find the 600GM giving me more keepers. In some shooting situations like swallows IF, I'll get more keepers with the 200-600 just because I'm more agile with it and less fatigued. The better AF motors in the 600GM really don't seem to make much difference to me. I like the 600GM for a little better acuity but mostly for the aperture and the ability to reach out to 1200mm when needed.
Thank you.